Patent GB-950205-A (GB)
Title: Process for the production of dispersions
IPC: D06P1/96
Filed: 1961-02-17
Abstract: A brushable dispersion of a solid in a liquid in which the solid is insoluble or only sparingly soluble is formed by foaming the liquid in the presence of a foam-forming substance with a quantity of solid in powder form that with normal mixing but in the absence of foaming with a foam-forming substance does not produce a brushable dispersion.  The liquid may contain a thickener, which may be partially coagulated by the addition of a coagulating agent. The liquid may have added to it prior to foaming a substance which during foaming generates a gas, e.g. ammonium carbonate.  The particle size of the solid may be 1 m  to 1 mm.  Specified thickeners are hydrolysed starch, cellulose ethers, e.g. the methylether, salts, e.g. alkali metal salts of cellulose ether carboxylic acids, mucilages, polypeptides such as glue, casein or albumin, water-soluble polyvinyl alcohols, polyacrylates, e.g. sodium polyacrylate, polyvinyl lactams, emulsions of heavy benzine in aqueous glue, latex, carob bean flour, polyvinyl acetate, dextrin and cellulose glycolate.  Specified liquids are water or non-aqueous liquids, e.g. monohydric alcohols of 1-6C, saturated aliphatic hydrocarbons of 6 or more carbon atoms or halogenated hydrocarbons, e.g. carbon tetrachloride or perchlorethylene of 2-7C the liquids may contain drying oils.  Specified solids are coloured pigments, e.g. T1O2, fire inhibitors, e.g. chlorinated paraffins or Sb2O3, thermoplasts, e.g. polyethylene or polyvinyl chloride, "Viscose" (Registered Trade Mark), fibres "Perbunan" (Registered Trade Mark) rubber, butadiene styrene polymers, aluminium stearate, sawdust to form cement compositions and metal powders, mica and dyestuff pigments in dispersions for treating textiles, leather and walls. For fixing the dispersions with respect to washing a fixing agent, e.g. a polyacrylic acid ester may be employed.  In an example, a dispersion of polyethylene powder is coated on to textiles or paper or other surfaces, the coated material is dried and thereafter stuck to another similar surface by the use of heat and pressure. Specified forming substances are alkali metal soaps, alkyl or aryl sulphonates, fatty alcohol sulphonates polyglycol ethers or esters, amine salts of alkyl aryl sulphonates and silicone oils.ALSO:A brushable dispersion of a solid in a liquid in which the solid is insoluble or only sparingly soluble is formed by foaming the liquid in the presence of a foam-forming substance with a quantity of solid in powder form that with normal mixing but in the absence of foaming with a foam-forming substance does not produce a brushable dispersion.  The liquid may contain a thickener, which may be partially coagulated by the addition of a coagulating agent.  The liquid may have added to it prior to foaming a substance which during foaming generates a gas e.g. ammonium carbonate.  The particle size of the solid may be 1m to 1 mm. Specified thickeners are hydrolized starch, cellulose ethers e.g. the methylether, salts e.g. alkali metal salts of cellulose ether carboxylic acids, mucilages, polypeptides such as glue, casein or albumin, water-soluble polyvinyl alcohols, polyacrylates e.g. sodium polyacrylate, polyvinyl lactams, emulsions of heavy benzine in aqueous glue, latex, carob bean flour, polyvinyl acetate, dextrin, and cellulose glycolate.  Specified liquids are water or non-aqueous liquids e.g. monohydric alcohols of 1-6C, saturated aliphatic hydrocarbons of 6 or more carbon atoms or halogenated hydrocarbons e.g. carbon tetrachloride or perchlorethylene of 2-7C the liquids may contain drying oils. Specified solids are coloured pigments e.g. T1O2, fire inhibitors e.g. chlorinated paraffins or Sb2O3, thermoplasts e.g. polyethylene or polyvinyl chloride, " Viscose " (Registered Trade Mark) fibres, " Perbunan " (Registered Trade Mark) rubber, butadiene styrene polymers, aluminium stearate, sawdust to form cement compositions and metal powders, mica and dyestuff pigments in dispersions for treating textiles, leather and walls. For fixing the dispersions with respect to washing a fixing agent e.g. a polyacrylic acid ester may be employed. In an example a dispersion of polyethylene powder is coated on to textiles or paper or other surfaces, the coated material is dried and thereafter stuck to another similar surface by the use of heat and pressure. Specified foam-forming substances are alkali metal soaps, alkyl or aryl sulphonates, fatty alcohol sulphonates polyglycol ethers or esters, amine salts of alkyl aryl sulphonates and silicone oils.ALSO:A brushable dispersion of a solid in a liquid in which the solid is insoluble or only sparingly soluble is formed by foaming the liquid in the presence of a foam-forming substance with a quantity of solid in powder form that with normal mixing but in the absence of foaming with a foam-forming substance does not produce a brushable dispersion.  The liquid may contain a thickener, which may be partially coagulated by the addition of a coagulating agent.  The liquid may have added to it prior to foaming a substance which during foaming generates a gas, e.g. ammonium carbonate. The particle size of the solid may be 1m  to 1 mm. Specified thickeners are hydrolized starch, cellulose ethers, e.g. the methylether, salts, e.g. alkali metal salts of cellulose ether carboxylic acids, mucilages, polypeptides such as glue, casein or albumin, water-soluble polyvinyl alcohols, polyacrylates, e.g. sodium polyacrylate, polyvinyl lactams, emulsions of heavy benzine in aqueous glue, latex, carob bean flour, polyvinyl acetate, dextrin, and cellulose glycolate. Specified liquids are water or non-aqueous liquids, e.g. monohydric alcohols of 1-6C, saturated aliphatic hydrocarbons of 6 or more carbon atoms or halogenated hydrocarbons, e.g. carbon tetrachloride or perchlorethylene of 2-7C, the liquids may contain drying oils. Specified solids are coloured pigments, e.g. TiO2, fire inhibitors, e.g. chlorinated paraffins or Sb2O3, thermoplasts, e.g. polyethylene or polyvinyl chloride, "Viscose" (Registered Trade Mark) fibres, "Perbunan" (Registered Trade Mark) rubber, butadiene styrene polymers, aluminium stearate, saw-dust to form cement compositions and metal powder, mica and dyestuff pigments in dispersions for treating textiles, leather and walls. For fixing the dispersions with respect to washing, a fixing agent, e.g. a polyacrylic acid ester may be employed.  In an example, a dispersion of polyethylene powder is coated on to textiles or paper or other surfaces, the coated material is dried and thereafter stuck to another similar surface by the use of heat and pressure.  Specified foam-forming substances are alkali metal soaps, alkyl or aryl sulphonates, fatty alcohol sulphonates, polyglycol ethers or esters, amine salts of alkylaryl sulphonates and silicone oils.ALSO:A brushable dispersion of an organic solid in a liquid in which the solid is insoluble or only sparingly soluble is formed by foaming the liquid in the presence of a foam-forming substance with a quantity of solid in powder form that with normal mixing but in the absence of foaming with a foam-forming substance does not produce a brushable dispersion.  The liquid may contain a thickener, which may be partially coagulated by the addition of a coagulating agent.  The liquid may have added to it prior to foaming a substance which during foaming generates a gas, e.g. ammonium carbonate.  The particle size of the solid may be 1 m  to 1 mm. Specified thickeners are hydrolized starch, cellulose ethers e.g. the methylether, salts e.g. alkali metal salts, of cellulose ether carboxylic acids, mucilages, polypeptides such as glue, casein or albumin, water-soluble polyvinyl alcohols, polyacrylates e.g. sodium polyacrylate, polyvinyl lactams, emulsions of heavy benzine in aqueous glue, latex, carob bean flour, polyvinyl acetate, dextrin, and cellulose glycolate. Specified liquids are water or non-aqueous liquids e.g. monohydric alcohols of 1-6 C, saturated aliphatic hydrocarbons of 6 or more carbon atoms or halogenated hydrocarbons e.g. carbon tetrachloride or perchlorethylene, of 2-7 C; the liquids may contain drying oils.  Specified solids are fire inhibitors e.g. chlorinated paraffins, aluminium stearate and dyestuff pigments in dispersions for treating textiles, leather and walls.  For fixing the dispersions with respect to washing, a fixing agent e.g. a polyacrylic acid ester may be employed.  Specified foam forming substances are alkali metal soaps, alkyl or aryl sulphonates, fatty alcohol sulphonates, polyglycol ethers or esters, amine salts of alkyl aryl sulphonates and silicone oils.